The postcard shows an Asiana Airlines Boeing 737-4Y0. The Boeing 737 Classic is the name given to the -300/-400/-500 series of the Boeing 737. They are American short to medium range, single aisle, narrow body jet airliners. The 737-400 design was launched in 1985. It stretched the 737-300 another 10 ft (3.45 m) to carry up to 168 passengers.
Asiana Airlines (Formerly Seoul Airlines) is an airline based in Seoul, South Korea and is one of South Korea's two major airlines.
Boeing 737 Classic Wikipedia Entry
Asiana Airlines Wikipedia Entry